﻿//
// (C) Copyright 2009 Irantha Suwandarathna (iranthas@hotmail.com)
// All rights reserved.
//

/* Copyright (c) 2001-2008, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use _in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions _in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer _in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Threading;
using EffiProz.Core.Lib;
using EffiProz.Core.RowIO;
using EffiProz.Core.Errors;
using EffiProz.Core.Indexes;

namespace EffiProz.Core.Persist
{
    public class RowStoreAVLDisk : RowStoreAVL
    {
        protected DataFileCache cache;
        protected RowOutputInterface rowOut;
        protected Table table;
        protected TransactionManager txManager;

        public RowStoreAVLDisk(PersistentStoreCollection manager,
                               DataFileCache cache, Table table)
        {

            this.manager = manager;
            this.table = table;
            this.indexList = table.getIndexList();
            this.accessorList = new CachedObject[indexList.Length];
            this.cache = cache;

            if (cache != null)
            {
                rowOut = cache.rowOut.clone();
            }

            manager.setStore(table, this);

            txManager = table.database.txManager;
        }

        public override bool isMemory()
        {
            return false;
        }

        public override int getAccessCount()
        {
            return cache.getAccessCount();
        }

        public override void set(CachedObject _object)
        {

            Row row = ((Row)_object);

            txManager.setTransactionInfo(row);
        }

        public override CachedObject get(int key)
        {

            CachedObject _object = cache.get(key, this, false);

            return _object;
        }

        public CachedObject getKeep(int key)
        {

            CachedObject _object = cache.get(key, this, true);

            return _object;
        }

        public override CachedObject get(int key, bool keep)
        {

            CachedObject _object = cache.get(key, this, keep);

            return _object;
        }

        public override CachedObject get(CachedObject _object, bool keep)
        {

            _object = cache.get(_object, this, keep);

            return _object;
        }

        public override int getStorageSize(int i)
        {
            return cache.get(i, this, false).getStorageSize();
        }

        public override void add(CachedObject _object)
        {

            int size = _object.getRealSize(rowOut);

            size = rowOut.getStorageSize(size);

            _object.setStorageSize(size);
            cache.add(_object);
        }

        public override CachedObject get(RowInputInterface _in)
        {

            try
            {
                return new RowAVLDisk(table, _in);
            }
            catch (IOException e)
            {
                throw Error.error(ErrorCode.DATA_FILE_ERROR, e);
            }
        }

        public override CachedObject getNewCachedObject(Session session, Object _object)
        {

            RowAVL row = new RowAVLDisk(table, (Object[])_object);

            add(row);

            if (session != null)
            {
                RowAction.addAction(session, RowAction.ACTION_INSERT, table, row);
            }

            return row;
        }

        public override void removeAll()
        {
            ArrayUtil.fillArray(accessorList, null);
        }

        public override void remove(int i)
        {
            cache.remove(i, this);
        }

        public override void removePersistence(int i) { }

        public override void release(int i)
        {
            cache.release(i);
        }

        public override void commitPersistence(CachedObject row) { }

        public override DataFileCache getCache()
        {
            return cache;
        }

        public override void setCache(DataFileCache cache)
        {
            this.cache = cache;
        }

        public override void release()
        {

            ArrayUtil.fillArray(accessorList, null);

            cache = null;
        }

        public override void setAccessor(Index key, CachedObject accessor)
        {

            Index index = (Index)key;

            accessorList[index.getPosition()] = accessor;
        }

        public override CachedObject getAccessor(Index key)
        {

            NodeAVL node = (NodeAVL)accessorList[key.getPosition()];

            if (node == null)
            {
                return null;
            }

            if (!node.isInMemory())
            {
                RowAVL row = (RowAVL)get(node.getPos(), false);

                node = row.getNode(key.getPosition());
                accessorList[key.getPosition()] = node;
            }

            return node;
        }

        public override void setAccessor(Index key, int accessor)
        {

            CachedObject _object = get(accessor, false);

            if (_object != null)
            {
                NodeAVL node = ((RowAVL)_object).getNode(key.getPosition());

                _object = node;
            }

            setAccessor(key, _object);
        }

        public override void resetAccessorKeys(Index[] keys)
        {

            if (indexList.Length == 0 || indexList[0] == null
                    || accessorList[0] == null)
            {
                indexList = keys;
                accessorList = new CachedObject[indexList.Length];

                return;
            }

            throw Error.runtimeError(ErrorCode.U_S0500, "RowStoreAVLDisk");
        }

        public override CachedObject getNewInstance(int size)
        {
            return null;
        }

        public override void lockStore()
        {
#if !SILVERLIGHT && !PLATFORM_COMPACTFRAMEWORK
            cache._lock.EnterWriteLock();
#else
            Monitor.Enter(cache._lock);
#endif
        }

        public override void unlockStore()
        {
#if !SILVERLIGHT && !PLATFORM_COMPACTFRAMEWORK
            cache._lock.ExitWriteLock();
#else
            Monitor.Exit(cache._lock);
#endif
        }
    }
}
